恒阻大变形锚索弹塑性解析模型及数值分析  

Analytical model of elasto-plastic and numeric analysis for the constant resistance large deformation(NPR)cable

作　　者：胡杰[1,2] 李兆华 冯吉利 张龙飞[1,2] 周田甜 何满潮 HU Jie;LI Zhaohua;FENG Jili;ZHANG Longfei;ZHOU Tiantian;HE Manchao(State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology(Beijing),Beijing100083,China;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《岩石力学与工程学报》2019年第S02期3565-3574,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重大研发计划重点专项资助(2016YFC0600901);国家自然科学基金资助项目(41172116);中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1718)。

摘　　要：为了分析恒阻大变形锚索超常力学机制,首先,建立弹塑性框架下NPR锚索的解析模型,经室内试验结果验证了该解析模型的正确性。其次,进行若干参数的敏感性分析,揭示恒阻力与锚索几何、力学参数之间的关系。最后,建立NPR锚索三维数值模型,根据室内试验结果标定了相应的参数,使得数值结果与试验结果吻合,讨论套筒的径向位移量和轴向位移量的变化趋势。解析模型和数值模型为今后NPR锚索的设计和改进提供了可靠的辅助工具。In order to analyze the supernormal mechanics mechanism of NPR cable,first,an analytical model was applied to analyze the mechanical property of the NPR cable in elasto-plastic framework and was verified by the experimental result;Second,several parameter sensitivity analyses were performed and discussed.The relationship between the constant resistance and the geometrical parameters and mechanical parameters was then revealed;Finally,a 3D numerical model of NPR cable was established,and the corresponding parameters were calibrated in line with the experimental results.The numerical results were in agreement with experimental and analytical results.The variation trend of radial and axial displacement magnitude of pipe was discussed.The numerical and analytical models were proven reliable as assistant tools to design and improve the NPR cables in the future.

关 键 词：数值分析 吸能锚索 静力拉伸试验 三维弹塑性解析模型 

分 类 号：O241[理学—计算数学]